228321512 has 8 divisors (see below), whose sum is σ = 428102850. Its totient is φ = 114160752.

The previous prime is 228321503. The next prime is 228321517. The reversal of 228321512 is 215123822.

It can be written as a sum of positive squares in only one way, i.e., 225780676 + 2540836 = 15026^2 + 1594^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×228321512² = 104261425683932288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228321517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14270087 + ... + 14270102.

Almost surely, 2^228321512 is an apocalyptic number.

It is an amenable number.

228321512 is a deficient number, since it is larger than the sum of its proper divisors (199781338).

228321512 is a wasteful number, since it uses less digits than its factorization.

228321512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28540195 (or 28540191 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 228321512 is about 15110.3114461615. The cubic root of 228321512 is about 611.1984965310.

The spelling of 228321512 in words is "two hundred twenty-eight million, three hundred twenty-one thousand, five hundred twelve".